Re: What is ogms daemon?

From Oracle 8 Parallel server Concepts Manual

Alex

> Using Group Membership Services
>
> Group Membership Services (GMS) is used by the Lock Manager (LM) and other Oracle components for inter-instance
> initialization and coordination. Instances of a distributed service can register with the GMS and retrieve the current set of
> instances providing the same service cluster-wide. The GMS monitors each of its clients and notifies the other instances of a
> given service when one instance stops or is shut down. It obtains a view of the current cluster membership from the (system
> specific) cluster management software.
>
> If a GMS instance or a node stops, the remaining GMS instances are informed through the cluster manager. Providers of
> distributed services are then be notified by the GMS if any of their peers stopped as a result of the node stoppage.
>
> Platforms which use the opsctl program start GMS automatically. For other platforms, you must start this process by manually
> issuing the ogmsctl command. This program has the following options:
>
> start
>
>
> start up the GMS instance on the current node
>
>
> stop
>
>
> stop the GMS instance on the current node
>
>
> abort
>
>
> kill the GMS instance on the current node
>
>
> status
>
>
> check the status of the GMS on the current node
>
>
> ogms_home=X
>
>
> set the GMS home directory to X, where debugging trace files and the communication key file will be
> written during its operation. The directory must be either local to its own node or different from other GMS
> directories in the network environment. Multiple GMS instances could be running at the same time in a
> cluster. When this option is specified, the corresponding OGMS_HOME initialization parameter needs to
> be specified as well to pick up the GMS listen port id information.
>
>
> trace=n
>
>
> set the GMS trace level to a number n between 0 and 10 (with 10 being the highest trace level). You can
> use this option with the start option or specify it separately after the GMS has been started.
>
>
>
>
>
> When you have installed the Oracle Parallel Server option, you must start the GMS, even to bring the instance up with parallel
> server disabled. If OPS is linked in, Oracle starts the Integrated Distributed Lock Manager and connects to the GMS to obtain
> a mount lock. This prevents you from accidentally mounting the database exclusive on more than one mode.
>
> See Also: Your Oracle system-specific documentation to determine whether GMS is started automatically, and whether it
> requires additional cluster configuration.
>

Yuichi Matsuki wrote:

> Hi !
>
> I installed "Oracle8.0.4 Server" the other day.
> When it started, the error message which it said as "It can't be
> connected to ogms." was received.
> So, a data base could be started after it started ogms daemon.
>
> Please teach anything about ogms.
>
> Thanks!
>
> Yuichi Matsuki
Received on Fri Feb 26 1999 - 08:08:13 CST